I created this worksheets so my students make questions in order to complete their missing information. Give a worksheet to each group of 2-3 students (it's better if you cut it into pieces). Students formulate one question at a time. One student of the group goes to the teacher and asks the question to the teacher: if the question is right, the teacher gives them the answer, but if it's wrong, the students have to correct it. You can make it into a game and the first team to have all the answers is the winner.
